Question

1. Which of the following is equivalent to x5y2/xy2 when x ≠ 0 and y ≠ 0?
A. x6y5
B. x5y
C. x4y
D. x4 *********

2. Which expression is NOT equal to 125?
A. 5(5^3/2/5)^2 ***************
B. (5^3/5^4)^-3
C.5^-2/5^-5
D. 5(5^5/5^3)

3. A fraction reduces to 36. If its denominator is 6x5, what is its numerator?
A. 63x
B. 63x5 **************
C. 6x5
D. 67x5

4. Which is the correct simplification of 5.4 x 10^12/1.2 x 12^3 written in scientific notation?
A. 4.5 × 10^7
B. 4.5 × 10^9 *************
C. 45 × 10^6
D. 6.48 × 10^7 5.